Update to LayerKit v0.8.3-b4
Update to LayerKit v0.8.3-b4

Eynaliyev/Atlas-Messenger-iOS,InterfaceInc/Atlas-Messenger-iOS,ropik/Atlas-Messenger-iOS,InterfaceInc/Atlas-Messenger-iOS,layerhq/Atlas-Messenger-iOS,Eynaliyev/Atlas-Messenger-iOS,ropik/Atlas-Messenger-iOS,layerhq/Atlas-Messenger-iOS,InterfaceInc/Atlas-Messenger-iOS